Schaet dse



sept. 30,1924. 1,510,164

E. RUEGGER REFRIGERATING INSTALLATION Fnac nay 14; 1923.

Patented Sept., 1924,

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SCHAFT DER MASCHINENFABRIKEN,ESCHER WYSS ,6G CIE.,` QE ZURICHf SWITZEB LANDe ynii,n:erenna'rrner rnsfretnnrvron.

Application led May,14, 1923. lSerial No. 638,892.

To all 'whom t mc/,g/ concern.' Be it known that I, r`lilnUAinii-Rtnieeiin` a citizen of the Republic of Switzerland,re

' siding` atZurich,-Switzerland? have invented` certain new rand useful Improvements in Re rigerating Installations, of which' the 'following is a specification, reference being had therein tothe accompanying drawing.

Y The *present inventionhasY reference to a contrivance for regulating the flow of cool ing water through refrigerating machines,l

the condenser ofvwhichiis cooled bystreaming water. f

` `V ,ith refrigerating machines damage to the. Condenser may occur especiallyin winter time owing to the freezing' r.of the ,coolingfwater` contained in thelconfkv denserg` This danger eXists in a high'degree with still, when ay determined cooling temperature yhasibeen reached; y 1 i The object .of the present invention is to provide a contrivance by whichthe above drawbackis overcome; ,To this end. a contrivance for regulating the flow of the cool-f'A ing water. through the refrigerating Vinachine, `whichcontrivance is influenced in an,

known manner by the .operation of therej frigerating 'machinegie hy'the cooling laction or byrthe workingA 'condition ofthe rey 1 ffrigerating machine7 is provided f according to the invention with two cut-.o fimembers one of which controls the Ainlet of the coolkfwa-terl contained in' theyrefrigerating machine to flow oiii when the supply forthe ing machine isstopped;

A constructional example matter oik ,the presentv invention isV illus tratedon the, accompanying drawing .which cooling water is Yclosed and :the refrigerat- 4() 'Y represents in .an elevation aV small auto!v matic refrigerating machine, the regulating contrivance forming. thegsubjectmatter of' ,1 the present invention being shown in sec.-

tion. f

In the drawing 1 denotes a Cooling chamber into which the'evaporator 2 o-fa small automatic;,- refrigerating- :machine y projects. 3 designates the condenser of thisfmachine and 4 is thedrrivingmotor Surrounded by a water cooli`=,'d']`a'cket,l the motor serving to 5 drive thel compressor which issurrounded the drawing.

automatic refrigerating ,i machines which are automatically brought-.to a standT ingvlwater to they condenser .and the other opens a` passage permitting the, cooling ofg the subject by the condenserr 3 and is not indicated in 5 is a switch for the electro motor 4 the switch being influenced by tilter 6, Switch arrangements this type are known and are described in my cepending application Ser. NofSAlQ; 'as Athe V'switch 5 does not form the subject matter :of the presentinvention a description of the switch is deemed to be superfluous. 7"

denotes the cooling water!` supply pipe and 8 is the conduit through which the cooling water 'flows Yoff. The flow of the cooling y water in to the 'condenser '3 iscontrolled of this typer the 1regniating` device A. The latter comprises a'dia'phragm casing'- 9 filled with an eXpanlsion mediunn the casing 'being vv:eX- teriorly iniuenced by the 'cooling action of the refrigeratingmachine. All over-satin rated vapour with a' certainffquantity ot liquid rin excess "is, for instance, filled-into' side when lookingv on the drawing yis heldf stationary hymeans of screw i'ioltlO, the opposite/ wall of the casing causes the movable [rod 11 to move, for instance towards Vthe `right whenthe cooling actiondecreases andthe temperat ure increases.l On the movable rodlltwo con-ical bodies 12', 13acting as cut-off members are provided vrllhe mem- 12 is 'adapted to cofoper'ate' with a seat 14 andthe memberl 13 with a kseatl.v The seats M and 15 are provided 'in a. casing llwhicli isrigidly ViYXedto a wall 17. The casingl comprises three chambers 18, and20 respectively. The supplypipe 7 is connected to the chamber 18. The y(chamber 19 is connectedtby means cfaconduit T21 to the point atrwhich the cooling ,waterenters intothe'coiidense'r3= and the chamber 20' lis connected by the `conduit22 to. the point in kwhich the cooling waterl leaves the `reirigerf` ating machine.

*75. the diaphragmcasing 9, so `that la comparafDuring the working of the refrigerating machine, i. e. when the switch 5 is so in-` iueiiced by the streaming cooling water as to keep the motor 4 operative, the various parte of the regulating device A occupy the positions illustrated in the drawing. The cut-off member 13 permits the coolintY water to pass from the chamber 18 to the chamber 19; the cut-off member 12, however7 rests against the seat 14, ASo that the cooling water fiows through the condenser 3 and the cooling jacket of the motor 1 in the direction indicated by the arrows C, As soon as a determined low temperature is reached within the chamber 1 the medium contained in the diaphragm casing 9 causes a displacement of the rod 11 towards the left, whereupon the open connection between the chambers 18 and 19 is interrupted and an open connection between the chambers 19 and 2O is established. The water contained in the refrigerating mac-bine flows thereupon by gravity and by the influence of the air entering the conduit 8 through the conduit 21 in the direction of the arrow B, indicated in dot-ted lines, and through the chambers 19and 2() into the discharge conduit 8. In this manner the cooling jackets of the condenser 3 and of the motor 4 are emptied whereby the danger of having these parts damaged by the freezing ofthe cooling water is removed.

I claim:

1. In a refrigerating plant,'the combination with a cooling chamber, a refrigerating machine having a condenser ,cooled by flowing water and an evaporator in said cooling chamber; of means in said cooling chamber inuenced by temperature changes, and two cut-off members operated by said means, one of which controls the admission of cooling water to the condenser and the other of which controls a passage permitting the cooling water contained in the refrigerating machine to drain off when the admission of cooling water is prevented by the first mentioned cut off member. 1

2. In a refrigerating plant, the combination with a refrigerating machine having a condenser cooled by flowing water, a cooling chamber and an evaporator in said cooling.

chamber; .of means in said cooling chamber influenced by temperature changesA in said chamber, and two simultaneously and oppositely operated cut-off members actuated by said means, one of said members controlling` the flow of cooling` water to said condenser and the other controlling a passage permitting the cooling water contained in the refrigerating machine to drain off when thev admission of cooling` water isprevented by the first mentioned member.

3. In a refrigerating plant, the combination with a refrigerating machine having condenser cooled by flowing water, a cooling chamber, and an evaporator in said cooling chamber; of a sangle therinlostaticnieans in the cooling chamber infiuenced by temperature changes in the chamber, two ncut-ott members outside of said chamber, arod connecting said means and members, one of said members controlling the fiow of cooling water to said condenser'and the other member controlling a passage permitting the cooling water contained inthe refrigerating machine to drain off. i

Il. In a refrigerating plant, the combina-- tion with a refrigerating machine having a condenser cooled rby flowing water, a cooling chamber, and an evaporator in said chamf ber; of a casing outside said chamber and having three compartments, one of said com-v partments having an inlet for coolingwa'te'r and a port connecting it with the second compartment and the inlet to the condenser, a connection between the discharge of the condenser and the third compartment, said thirdcompartment having a port connecting it with said second compartment and also having a liquid outlet, a: thermostat inthe cooling chamber and controlling means for the ports between the4 compartments ai, ranged for operation by said thermostat.

5, In a refrigerating plant, a cooling chamber. an electrically operated refrigerating machine having a condenser ceoled by flowing water and an evaporator' the cooling chamber; in combination with an electric switch 'controlling 'the operation of said, machine, a tilter to operate the switch, means to control the supply of cooling water to said condenser; means to permit the water contained inthe refrigerating machine "to drain off when the supply of ycooling water is cut olf by the first means, a thermostatic device in said cooling chamber connectedto both of said means,'said tilter arranged to receive the cooling water dischargedI from the condenser as well as the cooling water drained therefrom.

6. In a refrigerating plant, a cooling chamber,` a Athermostat therein, an electrll cally operated refrigerating machine having a condenser cooled by iowing water andan evaporator; invcombination with Van electric switch for said machine, a tilte-r to operate the. switch, a casing outside saicl.'cliainber having three compartments, two simultaneously and opposite-ly actuated membersea'ch controlling communication between two of said Vco'mpartments and operated by thel thermostat,y one of Isaid compartmentsbein'g connected to a' watersupply, the second connected to the inlet forcooling waterufor'the condenser, and the third'connected to the discharge of the condenser and discharging to said tilter. i

In Vtestimony whereof I afix my signature. 

